MedeaWiz Sprite 4K DV-S4 User Manual page 40

MedeaWiz® Sprite® 4K
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Each file name is analyzed at each character position left to right for the sort order priority to determine
the order the files will play in. To learn more about this, search for "ASCII sort order" in a web browser.
To keep it simple you can use the naming method in section A above, or just use the numbering system
001, 002, 003, etc. to play files in order.
Can I synchronize 2 or more Sprites to play together?
The Sprite® 4K has no way to Genlock or synchronize with any external device or another Sprite at frame
accuracy. You can start trigger files on 2 or more Sprites with a single pushbutton or serial control.
However there are very slight differences in the internal oscillator components that allow Sprites to run
at slightly different frame rates.
Depending on your application and video files, the frame rate difference may be acceptable and un-
noticed, or may not be acceptable. The longer the video in time, the more out of step the players will
become until the next trigger. You should use the same encoding parameters, CODEC, pixel size, frame
rate, bit rate and etc. for all files for best results.
If you want, you can get better results by comparing a few Sprites to get a better match, or altering the
video on the "fast" Sprite. Adding a few duplicate frames in the video file at regular intervals will "slow-
down" the progression of the scene to better match the slower Sprite.
How short or how long can my files be?
For all video and audio files:
Any file under approximately 3 to 5 seconds may be a problem. If they are too short, there may be
unwanted results in some control modes.
The 000 loop / ambient file should in most cases be longer. A longer loop file will allow your SD card to
last longer. A short file looping continuously reads a small area on the SD card. A long file stored across
more bytes of the SD results in less reads per byte over time. All SD and USB have a MTBF rated average
number of reads. This number is very large, but in an application that runs all day, every day, this will
add up. If you make the 000 loop file 10 times longer, your SD card should last 10 times longer as well.
Keep in mind that if you are using one of the Trigger Delay settings, your trigger file will not play until
the end of your 000 loop file.
Most users will never have an issue with a file that is too long. The time limit for the length of any file
depends on the file encoding and bits used per second. Lower bitrates, lower frame rates and reduced
pixel size can increase the time allowed. The file size is normally limited to 4 GB. Larger files may be
stored on the SD card or USB drive if it is formatted to exFAT or NTFS.
The maximum SD card size for the Sprite is 512GB.
The USB port will support a USB hard drive with no limit on size.
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